Binding Matter with Antimatter: The Covalent Positron Bond |
| |
Authors: | Jorge Charry Prof. Márcio T. do N. Varella Prof. Andrés Reyes |
| |
Affiliation: | 1. Universidad Nacional de Colombia Chemistry, Bogota, 00000, Colombia;2. Instituto de Física, Universidade de S?o Paulo, S?o Paulo, SP, Brazil |
| |
Abstract: | We report sufficient theoretical evidence of the energy stability of the e+?H22? molecule, formed by two H? anions and one positron. Analysis of the electronic and positronic densities of the latter compound undoubtedly points out the formation of a positronic covalent bond between the otherwise repelling hydride anions. The lower limit for the bonding energy of the e+?H22? molecule is 74 kJ mol?1 (0.77 eV), accounting for the zero‐point vibrational correction. The formation of a non electronic covalent bond is fundamentally distinct from positron attachment to stable molecules, as the latter process is characterized by a positron affinity, analogous to the electron affinity. |
| |
Keywords: | Ab initio calculations bond energy covalent bonds positron chemistry quantum chemistry |
|
|